Insulator



(No Model.)

W. M. DAVIS. INSULATOR.

No. 410,637. Patented Sept. 10, 1889.

UNITED STATES I PATENT OFFICE.

XVILLIAM M. DAVIS, OF PLYMOUTH, MASSACHUSETTS.

INSULATOR.

SPECIFICATION forming part of Letters Patent No. 410,637, dated September 10, 1889.

' Application filed April 25, 1889. Serial No. 308,553- (No model.)

T0 to whom it may concern:

Be it known that 1, WILLIAM M. DAVIS, a citizen of the United States, residing at Plymouth, in the county of Plymouth and State of Massachusetts, have invented a new and useful Insulator for Electrical Conductors, of which the following is a specification.

This invention has relation to insulators for electrical conductors, and is especially adapted for use in connection with the limbs of trees and other unstable supports where an occasional swaying takes place.

Among the main objects in view are to provide an insulator which, while being firmly secured to the tree or other support, is capable of securely and yet yieldingly retaining an electric wire, and this in such a manner that the wire will not be materially aifected or strained by the swaying of the tree or other support-as, for instance, is caused by windstorms-and will insure a dry insulation.

Other objects and advantages of the invention will hereinafter appear, and the novel features thereof will be particularly pointed out in the claims.

Referring to the drawings, Figure 1 is a perspective of an insulator and fastener or support constructed in accordance with my invention. Fig. 2 is a detail in perspective of the fastener removed. Fig. 3 is a vertical section of the same.

Like numerals of reference indicate like parts in all the figures of the drawings.

1 represents an ordinary electric insulator provided with the usual threaded socket 2, for the reception of a spindle or other support, and with a surrounding annular groove or recess 3, and a depending flange 16, out of contact with its support, thus preserving a perfect insulation in all kinds of weather. Passing partially around the insulator and mounted within the annular groove 3 is a bridle a. The bridle i is formed, in this instance, of two strands of wire 5 and 6, the strand 5 passing partially around the insulator in the groove 3, and about midway is joined by a companion wire 6, where a twist 7 is formed, the two wires then diverging to form an open loop 8 said wires again joining each other at an opposite point to that at which they diverge, where a second twist Sis made. At this point the wire 6 terminates; but the remaining wire 5 is extended singly, and is bent, as at 9, for connection with its opposite terminal, which is similarly bent at 10, to form the connection.

11 represents a semicircular shield, which is formed, preferably, of sheet or cast metal, the shield and wire being preferably of copper. The shield is provided with an outwardly-central bulge 12, and at its upper and lower ends with the rearwardly-inclined hooks 13, adapted to take over the upper and lower sides of a loop 8*, upon which they are firmly secured by being bent through the medium of a pair of pinchers. By mounting the shield upon the loop it will be seen that said loop, in connection with the unoccupied portion of the groove 3, forms a complete passage 14: for the electrical conductor 15, and the passage thus formed is of such dimensions with relation to the conductor as to permit a movement of the insulator in any direction without subjecting the wire or conductor to any strain thereby. It will also be noticed that the side walls of the shield or plate are somewhat flared, so that the branch upon which the insulator is mounted may be swayed in any direction, without regard to the direction or course of the wire.

Havin g described my invention, whatI claim 13- 1. The combination, with an insulator, of a bridle made to form a loop, and a shield mounted in the loop and adapted for connection with the opposite sides thereof, substantially as specified.

2. The combination, with an insulator, of a bridle made to form a loop, and a shield of semicircular form mounted in the loop and having its opposite ends formed to engage with the opposite sides of the loop, substantially as specified.

3. The combination, with an insulator, of a bridle consisting of two strands, the terminals of one being twisted around the other strand, and the terminals of the other strand being bent to engage with each other, and the two strands being oppositely bent intermediate their ends to form a loop, and a shieldplate mounted in the loop and provided with opposite hook ends for the engagement with ICO the opposite portions of the loop, substan- In testimony that I claim the foregoing as tially as specified. my own I have hereto aflixed my signature in IO 4. A bridle for insulators, made of wire in presence of two witnesses.

two strands, the strands being oppositely bent 5 intermediate their ends to form a loop, and D the shield-plate provided with opposite hook Witnesses:

ends to engage the opposite portions of the GEO. L. HANES,

loop, as set forth. CHARLES E. BARNES. 

